/*

   Copyright 2006  The Apache Software Foundation

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.apache.batik.parser;

import java.io.IOException;

/**
 * This class implements an event-based parser for semicolon separated
 * length pair lists, as used in the 'values' attribute of the 'animateMotion'
 * element.
 *
 * @author <a href="mailto:cam%40mcc%2eid%2eau">Cameron McCormack</a>
 * @version $Id$
 */
public class LengthPairListParser extends LengthListParser {

    /**
     * Parses the given reader.
     */
    protected void doParse() throws ParseException, IOException {
        ((LengthListHandler) lengthHandler).startLengthList();

        current = reader.read();
        skipSpaces();

        try {
            for (;;) {
                lengthHandler.startLength();
                parseLength();
                lengthHandler.endLength();
                skipCommaSpaces();
                lengthHandler.startLength();
                parseLength();
                lengthHandler.endLength();
                skipSpaces();
                if (current == -1) {
                    break;
                }
                if (current != ';') {
                    reportError("character.unexpected",
                            new Object[] { new Integer(current) });
                }
                current = reader.read();
                skipSpaces();
            }
        } catch (NumberFormatException e) {
            reportError("character.unexpected",
                    new Object[] { new Integer(current) });
        }
        ((LengthListHandler) lengthHandler).endLengthList();
    }
}
